JP2826068B2 - Sewing machine with root wrap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine with a button wrap.

[0002]

2. Description of the Related Art Conventionally, there has been known a sewing machine with a wrapping button which automatically wraps a flat button, a shank button, a marble button, and the like on a cloth. The root winding portion of the button sewn by the root winding button sewing machine needs reinforcement for preventing the thread from fraying. Therefore, conventionally, after sewing a button with a root-wound button sewing machine (of course, after a thread cutting operation), an adhesive is applied to the root-wound part manually in a separate step, or a thread of the root-wound part is removed with a solvent. By fusing the part, fraying of the root winding part was prevented.

[0003]

However, the above method has the following problems. That is, since the root winding portion is manually reinforced in a separate step after the thread cutting operation after the button sewing, there is a problem that productivity is reduced and cost is increased.

[0004] In addition, due to the lapse of time from the thread trimming operation after the button sewing to the reinforcing process, or the routing of the sewing material (the cloth to which the button is sewn), fraying of the thread occurs. Although reinforcement is performed in the reinforcement step, there is also a problem that the quality becomes unstable.

Accordingly, the present invention provides a method of automatically applying a reinforcing agent to a button-wrapping portion of a button, and incorporating this automatic reinforcing step into a series of button-wrapping sewing machines without increasing the number of steps. It is an object of the present invention to provide a root-wound button sewing machine capable of improving performance, reducing costs, and stabilizing quality.

[0006]

To achieve the above object, according to the Invention The root wrapping button sewing machine according to claim 1, a control device for automatically thread cutting operation after neck wrapping sewing completion button
Application of a reinforcing agent on the sewing machine with a button
A dispenser having a mouth disposed so as to be able to approach and separate from the root winding portion of the button is provided, and the control device drives the dispenser by sending a driving command simultaneously with a thread cutting operation after root winding sewing. To automatically apply reinforcement to the button
It is made to apply.

According to a second aspect of the present invention, there is provided a root winding button sewing machine provided with a control device for automatically performing a thread trimming operation after completion of the root winding sewing of the button. Apply the agent application port to the button
The detachably disposed the dispenser provided can moiety, the
The control unit operates between the completion of the root winding sewing and the thread trimming operation.
By sending a drive command , the dispenser is driven.
It works by automatically applying a reinforcing agent to the wrap around the button.

[0008]

According to the above-mentioned sewing machine with a button wound button, the dispenser applies a reinforcing agent to the button wound portion of the button at the same time as or before the thread cutting operation after the button wound sewing. Is done. Therefore, there is no need to manually reinforce the root winding part in a separate step, and this automatic reinforcing step can be incorporated into a series of root winding button sewing machines without increasing the number of steps, thereby improving productivity. And cost reduction is achieved. In addition, there is no time lapse from the thread cutting operation after the button sewing to the reinforcing process and the drawing of the sewing object is eliminated, and the quality is stabilized.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The sewing machine with a root-wound button according to this embodiment can perform both solid sewing and root-wound sewing, and can perform both the flat-wound and shank button (including marble button) root-wound sewing. It is.

The single-ring root-wound button sewing machine is shown in FIG.
As shown in FIG. 1, the sewing needle 1 drops into the threading hole provided in the button B (B '), penetrates the cloth, forms a single thread ring stitch, and sew the button B (B'). And a movable table 2 movable in the X and Y directions, a tongue 4 rotatably supported by a frame 3 of the movable table 2, and a fabric F (see FIGS. 3 and 4) folded in two. A lower cloth presser plate 5 fixed to the moving table 2, a chuck 6 that holds the button B (B ′) opposite to the lower cloth presser plate 5 and is rotatably supported by the frame 3, The moving knife 6 is moved via a chuck fixing and releasing air cylinder 60 (see FIG. 2) for fixing and releasing, and a thread cutting connection plate (not shown) as the cylinder piston built in the sewing machine bed M slides.
A thread cutting air cylinder 66 for rotating the moving knife support plate having the cutting knife 6c to cut a thread between the moving knife 66c and the fixed knife 66d (see FIG. 7 for the moving knife 66c and the fixed knife 66d); Pressing the upper fabric portion of the fabric F folded in half by the tongue 4 against the tongue 4;
That is, the main part is constituted by a presser foot 63A for holding the upper cloth portion between the tongue 4 and the presser foot 63A. Is made.

FIGS. 1 to 3 show the vicinity of the sewing needle 1.
As shown in FIG. 2, a wiper 90A having a front end (lower end in the figure) bent in the shape of a letter is provided. The wiper 90A is vertically moved by a wiper driving air cylinder 90, and is capable of scooping a needle thread after thread cutting, which will be described later, in a square shape by a descending and rising operation.

[0012] Further, in the above-mentioned sewing machine with a root-wound button, a dispenser 100 which is a feature of the present invention is provided. The dispenser 100 includes, for example, a dispenser portion 104 capable of applying a reinforcing agent such as an adhesive to the object when the application port 104a contacts the object, and an application port 104a of the dispenser portion 104. Dispenser drive air cylinder 10 for contacting / separating the button B (B ') from the root winding
3, a tank 106 containing a reinforcing agent, and the tank 1
And a flexible tube 105 for supplying the reinforcing agent in the dispenser portion 06 to the dispenser portion 104. The contact / application operation of the application port 104a of the dispenser portion 104 on the button wrap portion of the button is performed after the root wrap sewing. This is performed simultaneously with the thread cutting operation.

The tongue 4 is fixed via an arm 8 to a rotating shaft 7 attached to the frame 3 (only one is shown in FIGS. 1 to 4, but on both sides). Can be rotated as shown by. And tongue 4
When folded in the direction of the arrow, cooperates with the presser foot lower plate 5 to fold and support the fabric F in two. Also, tongue 4
A notch portion through which the sewing needle 1 penetrates is formed at the tip of. Reference numeral 9 denotes a tongue fixing and releasing air cylinder for fixing and releasing the tongue 4 by rotating the rotating shaft 7.

The lower plate 5 has a root winding 5A shown in FIG. 17 and a solid sewing 5B shown in FIG. 18. The moving table is provided depending on whether the root winding is performed or not. 2 is selectively fixed by screws. At this time, a root winding or solid sewing signal is selected by the switch 10A of the control unit 10 shown in FIG. Further, FIG.
By operating the button selection switch 10B, the control unit shown in FIG. 1 selects various button attachments of the flat button and the shank button shown in FIG. 15, and one of them is constituted by an optional read / write memory (RAM) 27. Can be set in the storage device. At the same time, the number of stitches for the button sewing and the needle drop position data are also stored in the storage device 27, so that 16 types of button sewing can be selected regardless of the flat button or the shank button.

That is, by operating the switches of the control section, the data of the type of button sewing, the number of stitches corresponding to the button sewing, and the needle drop position are stored in the storage device, and sewing of various buttons can be performed.

The button sewing data is stored in the storage device 2.
7, the operation panel 5 shown in FIG.
The sewing contents are indicated by the liquid crystal 53X as the display means 3. Here, reference numeral 53e indicates the sewing pattern as 5
3f is the vertical buttonhole pitch (3.6 mm in the figure)
And 53g are horizontal buttonhole pitches (3.6 in the figure).
mm) and 53h are the number of stitches with buttons (8 in the figure).
Needles) and the number of root winding needles (10 needles in the figure), 53i indicates presence or absence of a root winding (present in the figure), and 53j indicates a pattern number. Therefore, it is possible to prevent a mistake in selecting the type of button sewing.

At the time of manual operation, the key 5 on the operation panel 53 is used.
Each time 3q, 53r is input, the moving table 2 is changed to XY.
The needle drop position can be moved.
Here, reference numeral 53q denotes a one-needle feed switch, and 53r denotes a skip feed switch. Therefore, the needle drop position, that is, the sewing position can be confirmed without rotating the pulley once by hand or depressing the pedal to rotate the motor once as in the conventional case.

Thereafter, by operating the keys 53a to 53c, the sewing data (pitch) can be changed. At this time, the moving table 2 moves and is displayed on the liquid crystal 53X. Further, when the operation is set to the manual operation, the needle drop corresponding to the sewing of the button set by repeating the operation of the switches 53a to 53c is sequentially performed on the liquid crystal 5.
It can also be displayed on 3X.

Reference numeral 53k is a sewing pattern selection start switch, 53m is a vertical dimension change switch, 53n is a horizontal dimension change switch, 53p is a stitch number change switch,
53s indicates a reset switch, and 53d indicates a clear switch.

That is, in this single-ring root winding button sewing machine, the presser foot lower plate 5 is selected as the root winding 5A or the solid sewing 5B, and at the same time, the root winding sewing is performed by the switch 10A of the control unit 10. Alternatively, by setting to solid sewing, root winding or solid sewing can be selected. The bottom plate 5A for the root winding is always pulled toward the mounting side by the spring 22, and the tongue 4 at the time of the rotation advance is provided.
Has a vertical portion 5A 'opposed to the front end of the vertical portion 5A'. Also,
Holes through which the sewing needle 1 penetrates are formed in both the cloth presser lower plates. Reference numeral 11 denotes a needle plate.

The chuck 6 is located near the end of rotation of the tip of the tongue 4 and holds buttons from both sides. The retaining portion is shaped to fit a flat button and shank button as shown in FIGS. In the case of the flat button B, when the button is attached, it is held in a horizontal state as shown in FIG.
As shown in (2), it is held in a vertical state. When setting the shank button B 'having a sewing protrusion on the back surface, the sewing protrusion is held in a horizontal state as shown in FIG. 12 (2). The sewing order of the flat buttons is button attachment (horizontal posture), thread cutting (horizontal posture), root winding (vertical posture), thread cutting (inclined posture), and the sewing order of the shank button is button attachment (vertical posture). Posture), root winding (vertical posture), and thread cutting (inclined posture).

Since the position of the button of the chuck 6 must be horizontal or vertical as described above, the chuck inverting shaft 12 as a supporting shaft thereof is supported by the frame 3 so as to be rotatable by 90 degrees. As shown in FIG. 1, a connecting member 13, a forked knuckle joint 14
A chuck reversing air cylinder 15 for switching the chuck angle is connected via the. The mechanism itself for rotating the chuck reversing shaft 12 by the chuck reversing air cylinder 15 is a well-known flat button dedicated machine. The chuck reversing air cylinder 15 is a dual cylinder capable of changing the degree of extension of the rod 15a in three stages. Can be When the rod 15a is extended to the maximum, the chuck 6, that is,
When the button is horizontal and the rod 15a is fully retracted, the chuck 6 and the button are vertical. Rod 15a
Can be stopped at an intermediate position. In this state, the chuck 6 and the button take an inclined posture, and the operation of the thread cutting knife becomes possible.

That is, in the single-ring root-wound button sewing machine, the rod 1
The position of the chuck 6 can be changed to a horizontal, vertical or inclined position by an instruction of the central processing unit 26 based on a signal from the cylinder sensor 30 for detecting the position of the position 5a. Become.

As shown in FIGS. 1, 9 and 10, a sliding frame 12a is fixed to the end of the chuck reversing shaft 12, and a chuck base 16 is slidably mounted on the sliding frame 12a. The relative position is fixed by a set screw 17. Further, a chuck portion 18 is fixed to the chuck base 16, and the chuck 6 is attached to the tip thereof.

The chuck base 16 includes a chuck base 16.
A root winding height dial 19 that slides the chuck portion 18 in the direction of the surface is mounted. This is shown in FIG.
It is used when adjusting the distance between the needle plate 11 and the button B in (2), that is, the height of the wrap around the flat button. This mechanism itself is known (Japanese Unexamined Patent Publication No. 3-11 / 1991).
8091), and a description thereof will be omitted. The amount of adjustment is not very large.

By the way, since the shank button has a very long sewing protrusion on the back surface, it is impossible to set even a small adjustment amount of the root height dial 19. Therefore, the sliding mechanism of the chuck base 16 becomes important.
That is, the surfaces of the chuck base 16 and the chuck portion 18 are perpendicular to each other, and when the chuck portion 18, that is, the chuck 6 is vertical, the set screw 17 is loosened, and as shown in FIG. As shown, when the chuck base 16 is slid backward, the chuck 6 can be retracted with respect to the needle drop position, and the shank button B 'can be set on the chuck 6. The chuck base 16 and the sliding frame 12a when the flat button B is set on the chuck 6
Is as shown in FIG. 12 (1).

That is, by holding the chuck 6 slidably with respect to the chuck reversing shaft 12, the shank button B 'can be set on the chuck 6, and the chuck 6 can be attached to the flat button and the shank button B'. Common use is possible.

Further, as shown in FIG. 1, it is important that the axis C1 of the chuck reversing shaft 12 is slightly (about 1 mm) shifted from the chuck center (button core) C2 of the flat button.

FIG. 11 is a side view showing the positional relationship among the flat button B, the needle 1 and the needle plate 11 when sewing the flat button. (1) and (2) are the axes C of the chuck reversing shaft 12.
1 and the chuck center C2 are shifted from each other according to the present invention, and (1) shows the state at the time of attaching a button, and (2) shows the state at the time of root winding. According to this figure, the distance L2 between the flat button B and the needle plate 11 in (2) is the distance from the flat button B to the cloth F at the time of root winding, but in (2),
This is the sum of the distance L3 from the needle plate vertical surface to the axis C1 of the chuck reversing shaft 12 and the distance L4 between both shafts C1 and C2, that is, the distance L2 from the needle plate vertical surface to the chuck center C2. That is, the chuck is the axis C1 of the chuck reversing shaft 12.
When turning from the button attachment to the root winding, the cloth is pulled by increasing the distance to the cloth from the distance L0 at the time of attaching the button.
Although sewing failure occurs, in the case of the present invention, since the distance L2 to the cloth is shorter than the distance L0 and the thread is loosened, it is possible to neatly wrap the root. When the shank button B 'is sewn, the chuck 6 is made vertical and retracted with respect to the spindle of the chuck 6.

That is, by slightly eccentricizing the axis C1 of the chuck reversing shaft 12 with respect to the center C2 of the chuck, the flat button and the shank button can be wound around.

In FIG. 1, reference numeral 20 denotes a rake dial having a rake amount adjusting cam 21 at a lower portion. By the way, since the bottom plate 5 for root winding shown in FIG. 17 is constantly pulled by the spring 22 as described above, it comes into contact with the rake amount adjusting cam 21 and stops when it is set. . When the rake dial 20 is turned there, the rake amount adjusting cam 21 also rotates, and the presser foot lower plate 5 in contact therewith moves forward or backward, and the rake amount changes. When sewing the shank button, the scale of the rake dial 20 is set to 0, and the rake amount can be adjusted at a pitch of 0.2 mm by changing the hand operation. Fine adjustment in that case can be performed with the rake dial 20 (0.05 mm pitch).

That is, by operating the rake dial 20, fine adjustment of the flat button or the shank button becomes possible.

In FIG. 10, a stopper plate 24 fixed to the frame 3 and a stopper 25 projecting from the chuck base 16 are used to set the chuck 6 with respect to the chuck reversing shaft 12 when setting the shank button, as described above. This constitutes a safety device for preventing the chuck 6 and the needle 1 from being damaged due to retreat. When sewing the shank button shown in FIG. 16 (2), the two are moved backward with respect to the chuck reversing shaft 12 to be in the inclined state (at the time of thread trimming).
The positions are opposed to each other with a gap of 1 mm.

That is, in sewing the shank button,
The chuck base 16 is in the retracted state, and FIG.
When the button is placed at the position indicated by the solid line, the thread is cut at the inclined position indicated by the dashed line. At this time, the chuck base 16 rotates in the direction of the arrow, and the stopper 25 is the stopper plate 24. And stop with a slight gap. In this state, even if the button selection switch 10B of the control unit shown in FIG. 14 is erroneously changed from the shank button to the flat button, the stopper 25 hits the stopper plate 24, and the chuck base 16 and the chuck 6 rotate further. Instead, the chuck 6 can be prevented from hitting the needle 1. When the stopper 25 hits the stopper plate 24, an alarm can be issued by a signal from the cylinder sensor 30 that detects the position of the rod 15a attached to the chuck reversing air cylinder 15.

That is, in a state where the chuck base 16 retreats and is inclined to the thread cutting position (inclination of 45 °), the inexpensive and simple stopper plate 24 and the stopper 25 are provided to face each other with a small interval therebetween, so that they can be surely opposed. Parts can be prevented from being damaged.

On the other hand, in the case of sewing a flat button, FIG.
As shown in (1), the chuck base 16 does not retreat, and the positions of the stopper plate 24 and the stopper 25 at the inclined position shown by the dotted line are shifted. Therefore, chuck base 1
There is no problem in rotating the 6 between the position shown by the solid line when the button is attached, the position shown by the dashed line when the root is wound, and the inclined position when the thread is trimmed.

In the above single-ring root-wound button sewing machine, tongue fixing, release air cylinder 9, chuck reversing air cylinder 15, chuck fixing, release air cylinder 60, cloth presser air cylinder 63, thread cutting air cylinder are used as actuators. 66, wiper driving air cylinder 90, dispenser driving air cylinder 1
Although only 03 is described, various air cylinders and air devices for executing each sewing operation are actually provided. That is, a thread end holding air cylinder for holding the thread end at the start of sewing, an air blow for winding the thread end at the time of root winding, a chuck vertical air cylinder 61 for moving the chuck 6 up and down (see FIG. 2), and sewing. A thread feeding air cylinder which rotates a thread feeding member (not shown) in conjunction with the sliding of a piston to feed a thread when the operation is performed, a thread tension switching air cylinder with a button, and which switches a thread tension according to a root winding. An air cylinder for pressing a shank button, an air cylinder for carrying a button to a button chuck 6 for a button loader, an air cylinder for moving a button carrier up and down, and an air cylinder for leveling a button carrier are provided.

The control of each of the above components is performed by a control device shown by a block circuit in FIG. In FIG. 5, reference numeral 26 denotes a central processing unit (CPU), and reference numerals 27 and 28 denote RA as a storage device for transmitting data and the like to the central processing unit 26.
M and ROM, respectively, and the central processing unit 26
Is an electromagnetic valve driver 1 that controls on / off of the dispenser driving air cylinder 103 simultaneously with the thread trimming operation after the root winding sewing in addition to the control for performing the normal button sewing.
A drive command is sent to the dispenser section 104a.
Thus, it is possible to control the application of the reinforcing agent to the root winding portion of the button.

That is, the central processing unit 26 operates the switches 53a to 53d and 53k to 53
s, a pedal switch 39, a cylinder sensor 30, a signal from the switch group 10 (10A, 10B) of the control unit, and a needle position signal 43a from a well-known synchronizer 43 which is arranged in relation to the main shaft of the sewing machine and detects a needle up position. The input circuit 44 receives a dispenser retreat signal from the dispenser retreat detection sensor 100b for detecting retreat of the dispenser portion 104 and a thread trimming end signal from a thread trimming sensor 66b for detecting completion of the thread trimming operation by the thread trimming air cylinder 66. Received through the switches 53a-53d, 53
Switch indicator light 53 that lights when the function of k to 53s is valid
Indicator light driver 45 for turning on Y, and solenoid valve drivers 9a, 15a, 60a, 6 for controlling on / off of air cylinders 9, 15, 60, 63, 66, 90, 103.
3a, 66a, 90a, 103a, a step motor driver 47 for driving the X motor and the Y motor, and a sewing machine motor control circuit 4 for controlling a motor driver 48 of the sewing machine.
9 is configured to transmit a signal via an output circuit 55, and is configured to transmit a signal to a liquid crystal 53X of an operation panel 53 via a liquid crystal control circuit 56.

Next, the operation of the root-wound button sewing machine configured as described above will be described with reference to the flowchart shown in FIG. 6, focusing on the operation of applying a reinforcing agent to the root-wound part of the button, which is a feature of the present invention. This will be described below.

First, in step 1, it is determined whether to perform root winding sewing or solid sewing. If solid sewing is to be performed, the process proceeds to step 11, and in step 11, the flow proceeds to the right side of the flowchart in FIG. A solid stitching operation whose details are shown is performed.

On the other hand, if it is determined in step 1 that root wrap sewing is to be performed, the process proceeds to step 2, where it is determined in step 2 whether a flat button or a shank button is to be sewn. In the case of performing the flat button root wrap sewing operation whose details are shown in the flow on the left side of the flowchart of FIG. 8 and sew the shank button,
A shank button root winding sewing operation whose details are shown in the center flow of the flowchart of FIG. 8 is performed.

In step 3, regardless of whether the button is a flat button or a shank button, an on signal is sent to a solenoid valve driver 60a for controlling on / off of the chuck fixing / opening air cylinder 60 in step 3, and the button of the chuck 6 is pressed. The holding operation is performed, and the presser foot air cylinder 63 is held.
An ON signal is sent to the solenoid valve driver 63a for controlling the ON / OFF of the cloth presser 63A to cause the cloth presser 63A to perform the cloth presser operation on the fabric F (see FIG. 3).

Then, the process proceeds to step 4, in which the sewing machine is driven by the ON signal of the pedal switch 39, and the process proceeds to step 5, where the buttons are sewn. As described above, the sewing order of the flat button is button attachment (horizontal posture), thread trimming (horizontal posture), root winding (vertical posture), thread trimming (tilted posture), and the sewing order of the shank button is as follows. Buttoning (vertical posture), root winding (vertical posture), and thread cutting (inclination posture) are shown in detail in FIG.

After the root winding sewing program has been completed in the above detailed process, the process proceeds to step 6, where the sewing machine is stopped upward by the generation of a needle position signal. FIG. 7A schematically shows this state in an easily understandable manner. Hereinafter, the operation will be described with reference to FIGS.

In the state in which the sewing machine is stopped after sewing the button shown in FIG. 7 (a), the wiper 90A and the dispenser portion 104 are on standby above, and the thread is below the button B (B '). A loop is formed as shown in the figure by a thread pulling mechanism (not shown).

Then, the process proceeds to step 7, and in step 7, after the above-mentioned upper stop, regardless of the case of the flat button or the shank button, the chuck reversing air cylinder 15
Acts, and as shown in FIG.
Is rotated from the vertical position to a 45 ° tilt position.
This change in posture is to prevent the moving knife 66c from interfering with the button B (B ') when the moving knife 66c described later moves.

Then, the process proceeds to a step 8, wherein the rod 15 of the chuck reversing air cylinder 15 is
When it is detected that the chuck 6 is in the inclined posture based on a signal from the cylinder sensor 30 for detecting the position of the a, the on signal is sent to the solenoid valve driver 66a for controlling the on / off of the thread cutting air cylinder 66 to perform the thread cutting. I do. That is, the moving knife 66c is moved toward the fixed knife 66d, and the thread is cut between the moving knife 66c and the fixed knife 66d.

Simultaneously with the generation of the ON signal to the solenoid valve driver 66a, the dispenser driving air cylinder 103
A drive command is sent to a solenoid valve driver 103a that controls the turning on and off of the application port 104a of the dispenser portion 104.
As shown in FIGS. 7 (c) and 4, the contact is made to the wrapping portion of the button, and the reinforcing agent is applied to the wrapping portion. That is, this coating operation is performed simultaneously with the thread cutting.

Then, the process proceeds to step 9, and in step 9, when the retraction of the dispenser portion 104 is detected based on a signal from the dispenser retraction detection sensor 100b for detecting the retraction of the dispenser portion 104, the wiper driving air cylinder 90 An ON signal is sent to an electromagnetic valve driver 90a for controlling ON / OFF, and as shown in FIG. 7 (d), the wiper 90A is lowered, and the needle thread after thread trimming is hooked at the square-shaped portion. After that, an OFF signal is sent to the solenoid valve driver 90a to raise the wiper 90A as shown in FIG. Driver 66a
The moving knife 66c is retracted to the original position.

Then, the process proceeds to Step 10 and Step 1
0, when the thread trimming end signal from the thread trimming sensor 66b is received, the tongue fixing, the solenoid valve driver 9a for controlling the on / off of the open air cylinder 9, the chuck fixing,
An off signal is sent to each of an electromagnetic valve driver 60a for controlling on / off of the opening air cylinder 60 and an electromagnetic valve driver 63a for controlling on / off of the presser air cylinder 63, and the posture of the chuck 6 is set to 45 ° by the chuck inverting air cylinder 15. Is turned from the inclined posture to the original posture.

As described above, in this embodiment, the dispenser 100 to which the reinforcing agent can be applied is provided, and the reinforcing agent is applied to the root winding portion of the button by the dispenser 100 simultaneously with the thread cutting operation after the root winding sewing. This eliminates the need to manually reinforce the wraparound part in a separate process.Moreover, this automatic reinforcement step is incorporated into the series of wraparound button sewing machines without increasing the number of steps. (It is proceeding simultaneously with the thread cutting operation),
It is possible to improve productivity and reduce costs. In addition, there is no time lapse between the thread cutting operation after the button sewing and the reinforcing process and the routing of the sewing object, and the quality can be stabilized.

Although the invention made by the inventor has been specifically described based on the embodiments, the present invention is not limited to the above-described embodiments, and can be variously modified without departing from the gist thereof. Needless to say. For example, in the above embodiment, the reinforcing agent is applied to the root winding portion of the button by the dispenser 100 at the same time as the thread cutting operation after the root winding sewing, but the thread cutting operation in step 7 is performed by the needle position signal. The application operation by the dispenser 100 may be performed at the same time as the tilting operation of the previous button posture. Also, for example, if there is some free time after the button sewing and before the thread cutting operation, the dispenser 100 A coating operation may be performed. Even in this case, since the automatic reinforcing step is incorporated without increasing the number of steps during the series of root winding button attaching sewing machines, the same effect as in the above embodiment can be obtained. Not even.

Further, in the above embodiment, the reinforcing agent is applied by bringing the application port 104a of the dispenser portion 104 into contact with the root winding portion, but the dispenser portion 104 is separated from the root winding portion to some extent. The dispenser driving air cylinder 103 may be driven in such a manner that the dispenser portion 104 may be configured so that the reinforcing agent can be sprayed and sprayed. Alternatively, the dispenser 100 may be provided on the moving knife 66c, and the dispenser portion 104 on the moving knife 66c may apply, spray, or spray a reinforcing agent on the root winding portion.

Also, as described above, the dispenser portion 1
The dispenser portion 104 can be fixed if the reinforcing material is configured so that the reinforcing agent can be sprayed and sprayed and the reinforcing agent can be reliably sprayed and sprayed on the root winding portion.

In the above embodiment, the reinforcing agent is an adhesive, but any other material may be used as long as it can reinforce the root wrap and prevent fraying.

In the above embodiment, the moving knife 66
In order to avoid interference between the button c and the button, the chuck 6 is tilted by 45 degrees by the chuck reversing air cylinder 15, but if the structure does not interfere, the coating is performed in the vertical posture. The operation may be performed.

In the above embodiment, the actuator is, for example, an air cylinder. However, the actuator is not limited to the air cylinder, and may be replaced with, for example, an electromagnetic solenoid.

Further, in the above embodiment, an example of application to a root-wound button sewing machine capable of performing both solid sewing and root-wound sewing, and capable of performing both flat-button and shank-button root-wound sewing is described. However, the present invention can be applied to all sewing machines with a button wrap.

[0060]

As described above, according to the root winding button attaching sewing machine of the first and second aspects, it is not necessary to manually reinforce the root winding portion in a separate step. Since the button sewing machine can be incorporated without increasing the number of steps during the step, the productivity can be improved and the cost can be reduced. In addition, there is no time lapse from the thread cutting operation after the button sewing to the reinforcing process and the drawing of the sewing object is eliminated, and the quality can be stabilized.

[Brief description of the drawings]

FIG. 1 is a perspective view of a root-wound button sewing machine showing one embodiment of the present invention.

FIG. 2 is a view of FIG. 1 as viewed from the left side in a state where the presser foot air cylinder is driven from the state of FIG. 1;

FIG. 3 is a perspective view of FIG. 2 viewed from the direction of FIG. 1;

FIG. 4 is a perspective view of the sewing machine showing a state in which a dispenser driving air cylinder is driven from the state of FIG. 3;

FIG. 5 is a block diagram for controlling the sewing machine.

6 is a flowchart schematically showing an example of a program stored in a ROM in FIG.

FIG. 7 is a diagram schematically showing a main part for explaining the operation of the sewing machine.

FIG. 8 is a flowchart showing a program stored in a ROM in FIG. 5 in detail.

FIG. 9 is a plan view of a main part of the sewing machine.

FIG. 10 is a perspective view of a main part of the sewing machine.

11 is a side view showing the positional relationship between the button, the needle, and the needle plate when sewing the flat button, (1) shows the state when the button is attached, and (2) shows the state when the root is wound.

FIGS. 12A and 12B are views showing a button set state, wherein FIG. 12A shows a flat button set state, and FIG. 12B shows a shank button set state.

FIG. 13 is a front view of an operation panel of the sewing machine.

FIG. 14 is a front view of a control unit of the sewing machine.

FIG. 15 is a diagram showing types of button sewing.

FIG. 16 is a side view showing the relationship between the stopper plate and the stopper, wherein (1) is for sewing a flat button, and (2) is for sewing a shank button.

FIG. 17 is a perspective view of a lower plate for a root wrap.

FIG. 18 is a perspective view of a cloth press lower plate for solid sewing.

[Explanation of symbols]

 66c Moving knife 66d Fixed knife 100 Dispenser B, B 'button

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D05B 3/16 D05B 3/14 D05B 81/00 D05B 17/00 A44B 1/18 A41H 37/10

Claims (2)

(57) [Claims] 1. A root winding button sewing machine provided with a control device for automatically performing a thread trimming operation after completion of root winding sewing of a button.
The above-mentioned control device drives simultaneously with the thread trimming operation after the root winding sewing.
The dispenser is driven by sending a motion command
Ru is automatically applied a reinforcing agent in the neck wrapping part of the button to
Sewing machine with root winding button with configuration . 2. A root winding button sewing machine provided with a control device for automatically performing a thread cutting operation after completion of root winding sewing of a button, wherein an application port of a reinforcing agent is disposed so as to be able to approach and separate from a root winding portion of the button.
The dispenser is provided, and the above-mentioned control device operates from the completion of the root winding sewing to the thread trimming operation .
By sending a drive command in the meantime , the dispenser
Neck wrapping button sewing machine equipped with automatic coating <br/> is not Ru constituting the reinforcing agent in base-winding portion of the button to drive the.